* {
  /* 初始化 */
  margin: 0;
  padding: 0;
}
body {
  /* 100%窗口高度 */
  height: 100vh;
  /* 弹性布局 水平+垂直居中 */
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #000;
  /* 溢出隐藏 */
  overflow: hidden;
}
.container {
  /* 设置视距 */
  perspective: 5px;
  /* 设置3D元素的基点位置 */
  perspective-origin: 50% 50%;
}
.wrap {
  /* 绝对定位 */
  position: absolute;
  width: 1000px;
  height: 1000px;
  left: -500px;
  top: -500px;
  /* 开启3D效果 */
  transform-style: preserve-3d;
  /* 执行动画：动画名 时长 线性的 无限次播放 */
  animation: move 20s linear infinite;
}
.wall {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url("../../images/views//space1.webp") no-repeat;
  /* 保持原有尺寸比例，裁切长边 */
  background-size: cover;
}
/* 为各个方位的“墙壁”设置旋转角度、Z轴位移 */
.wall-top {
  transform: rotateX(90deg) translateZ(500px);
}
.wall-bottom {
  transform: rotateX(-90deg) translateZ(500px);
}
.wall-left {
  transform: rotateY(-90deg) translateZ(500px);
}
.wall-right {
  transform: rotateY(90deg) translateZ(500px);
}
.wall-back {
  transform: rotateX(180deg) translateZ(500px);
}
.form-box {
  /* 相对定位 */
  position: relative;
  background-color: rgba(255, 255, 255, 0.1);
  width: 400px;
  height: 550px;
  border-radius: 15px;
  border-top: 1px solid rgba(255, 255, 255, 0.5);
  border-left: 1px solid rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  flex-direction: column;
  /* 背景模糊 */
  backdrop-filter: blur(20px);
  /* 阴影 */
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}
.form-box .tit {
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  /* 大写 */
  text-transform: uppercase;
  /* 字间距 */
  letter-spacing: 10px;
  text-indent: 10px;
  margin: 95px auto 50px auto;
}
.form-box input {
  width: 300px;
  height: 30px;
  background: transparent;
  text-indent: 8px;
  border: none;
  outline: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.8);
  color: #fff;
  margin: 15px auto;
}
.form-box input::placeholder {
  color: rgba(255, 255, 255, 0.8);
}
.form-box button {
  width: 300px;
  height: 40px;
  margin: 35px auto 40px auto;
  border: none;
  background: #00addd;
  color: #fff;
  border-radius: 8px;
  letter-spacing: 20px;
  text-indent: 20px;
  font-weight: bold;
  cursor: pointer;
}
.form-box button:hover {
  background: #0098d4;
}
.form-box span {
  font-size: 14px;
  color: #fff;
}
.form-box a {
  color: #00addd;
  text-decoration: none;
}

/* 定义动画 */
@keyframes move {
  0% {
    transform: rotate(0deg) translateZ(-500px);
  }
  100% {
    transform: rotate(90deg) translateZ(500px);
  }
}
